Description

For measurement of phase front angular dispersion of Gaussian laser beams.

Propagation of laser pulses through any prisms and wedges diverts the propagation direction of different spectral components and hence spectrally disperses the beam. If the spectral components are plane waves, then the propagation direction angular dispersion determined by the angle between the propagation directions of the components equals the phase front angular dispersion (PFAD) determined by the angle between their phase fronts. In case of Gaussian-beams, however, the phase fronts may be curved therefore the two definitions can give different values. The PFAD is the more relevant definition because if it is nonzero it results in a chirping and consequently temporal lengthening of the pulse along with deterioration of the temporal contrast, as well. In the spatial domain, the beam profile becomes spectrally asymmetric along the plane of angular dispersion.

Specifications

^{1) The range and accuracy depend on the specifications of the imaging spectrograph and the software. The displayed values are for color depth of 10 bit, spectral resolution of 0.1 nm, spatial resolution of 3.3 μm and around 800 nm and for FRINGER.
2)Accessible spectral range is determined by the available mirrors and imaging spectrograph (e.g. CEO-2D-800 by CEOptics).Depends on the specifications of the spectrometer. The displayed value is for valid for spectrograph with a spectral resolution of 0.3 nm and center wavelength at 800 nm.}

Custom designs available to suit your needs best.

Features

• All linear optical solution;
• Independent of wavelength (suitable for (V)UV- (N)IR;
• Requires low input power / pulse energy
• High precision
• Real time operation
• Simple to align and operate

Accesories

• FRINGER software for evaluation
• MePS, high accuracy beam rotator for 2D charactersiation of the beam.